초록 ▼

A heat dissipation device is to be mounted in a computer enclosure for dissipating heat generated by a VGA card (10). The heat dissipation device includes a heat sink (90), a fan (60) and a fan duct (50) connecting the heat sink (90) and the fan (60). The heat sink (90) contacts a heat-generating de

A heat dissipation device is to be mounted in a computer enclosure for dissipating heat generated by a VGA card (10). The heat dissipation device includes a heat sink (90), a fan (60) and a fan duct (50) connecting the heat sink (90) and the fan (60). The heat sink (90) contacts a heat-generating device (12) of the VGA card. The fan (60) has an inlet port (62) and an outlet port (63). The outlet port (63) communicates with an ambient air outside the computer enclosure. The fan duct (50) has two open ends (55,52). One open end (55) engages with the heat sink (90) and the other open end (52) engages with the inlet port (62) of the fan (60).

대표청구항 ▼

What is claimed is: 1. A heat dissipation device mounted in a computer enclosure, comprising: a heat sink for contacting a heat-generating device of a VGA card in the computer enclosure; a fan having an inlet port and an outlet port, the outlet port communicating with an inner space of the computer

What is claimed is: 1. A heat dissipation device mounted in a computer enclosure, comprising: a heat sink for contacting a heat-generating device of a VGA card in the computer enclosure; a fan having an inlet port and an outlet port, the outlet port communicating with an inner space of the computer enclosure and outer ambient air outside the computer enclosure; and a fan duct having two opposite free open ends, one of the open ends engaging with the heat sink and the other open end engaging with the inlet port of the fan; wherein when the fan is operated, an airflow is generated to flow through the heat sink, the fan duct, the inlet port of the fan and then the outlet port of the fan to reach the outer ambient air outside the computer enclosure, whereby heat generated by the heat-generating device of the VGA card is dissipated to the outer ambient air; wherein the heat sink comprises a base, a plurality of fins mounted on the base and a cover mounted to the base and covering the fins; wherein an intake is defined by the base and the cover of the heat sink, and the cover defines an opening in alignment with the fan duct; and wherein the base comprises a rectangular main body and a semicircular extension extending from a lateral side of the main body, the fins being mounted on the main body of the base and the opening of the cover facing to the semicircular extension of the base. 2. The heat dissipation device as described in claim 1, wherein the cover comprises a top wall spaced from the base and a sidewall extending downwardly from an edge of the top wall, and the sidewall comprises two straight portions and a semicircular portion corresponding to the semicircular extension of the base. 3. The heat dissipation device as described in claim 1, wherein the fan, the heat sink and the VGA card are oriented substantially parallel to each other. 4. The heat dissipation device as described in claim 1, wherein the fan comprises a mounting plate for mounting the fan on the computer enclosure. 5. The heat dissipation device as described in claim 1, wherein the fan duct is made of flexible material. 6. The heat dissipation device as described in claim 1, wherein a length of the fan duct is adjustable. 7. A computer add-on card assembly comprising: an add-on card having a heat-generating electronic component mounted thereon; a heat sink mounted on the add-on card, comprising: a base in thermal connection with the heat-generating electronic component, the base comprising a rectangular main body and a semicircular extension extending from a lateral side of the main body; a plurality of fins mounted on the base except the semicircular extension of the base, and channels defined between the fins; and a cover mounted to the base in a such a manner as to cover the fins; a blower fan; and a telescopic fan duct mounted between the cover and the fan to communicate with the channels of the fins and the fan, wherein the fan has an inlet port in communication with the fan duct and an outlet port adapted for communicating with an outer ambient air outside a computer enclosure when the computer add-on card assembly is mounted in the computer enclosure; wherein the fan duct is in alignment with the semicircular portion of the base. 8. The computer add-on card assembly as described in claim 7, wherein the fan duct has a hollow cylindrical configuration. 9. The computer add-on card assembly as described in claim 7, wherein the fan duct is made of flexible material. 10. The computer add-on card assembly as described in claim 7, wherein the fan duct has two opposite free open ends, one of the open ends engaging with the cover and the other open end engaging with the fan. 11. The computer add-on card assembly as described in claim 10, wherein the cover comprises a top wall spaced from the base and a sidewall extending downwardly from an edge of the top wall, and the sidewall comprises two straight portions and a semicircular portion corresponding to the semicircular extension of the base, and the top wall defines an opening in alignment with the fan duct. 12. The computer add-on card assembly as described in claim 7, wherein a back plate is attached to a bottom of the add-on card for securing the base to the heat-generating electronic component. 13. The computer add-on card assembly as described in claim 7, wherein the add-on card, the heat sink and the fan are oriented substantially parallel to each other, while the fan duct is oriented perpendicular to the add-on card, the channels of the heat sink and the fan.